package 结构型模式.桥接模式;
//抽象的操作系统（抽象化角色）
public abstract class OperatingSystem {
    //声明videoFile变量
    protected VideoGFile videoGFile;

    public OperatingSystem(VideoGFile videoGFile) {
        this.videoGFile = videoGFile;
    }

    public abstract void play(String fileName);
}
